公开(公告)号：US11508987B2

公开(公告)日：2022-11-22

申请号：US16640159

申请日：2018-10-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro Harada ,  Hiroshi Minami

IPC: H01M4/485 ,  H01M10/052 ,  H01M4/04 ,  H01M4/38 ,  H01M4/66 ,  H01M10/0587 ,  H01M4/02

Abstract: The nonaqueous electrolyte secondary battery comprises the following: a positive electrode including a positive electrode active material that includes a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector wherein lithium metal deposits on the negative electrode current collector during charging, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The molar ratio of the total amount of lithium held by the positive electrode and the negative electrode to the amount of transition metal in the positive electrode is not more than 1.1. In addition, in the discharged state, a space layer is present between the negative electrode and the separator, and the positive electrode capacity per unit area, α (mAh/cm2), of the positive electrode and the average in thickness, X (μm), of the space layer 50 satisfy 0.05≤α/X≤0.2.

公开(公告)号：US20210111429A1

公开(公告)日：2021-04-15

申请号：US16496556

申请日：2018-01-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroshi Minami ,  Yuta Seki

IPC: H01M10/0563 ,  H01M4/66 ,  H01M10/0525

Abstract: A non-aqueous electrolyte secondary battery is equipped with: a positive electrode provided with a positive electrode current collector and a positive electrode mixed material layer formed on the current collector; a negative electrode provided with a negative electrode current collector; and a non-aqueous electrolyte. A lithium secondary battery which is configured so that metal lithium is deposited on a negative electrode current collector during charging and the metal lithium is dissolved in a non-aqueous electrolyte during discharging. The non-aqueous electrolyte contains a lithium salt for which the anion is an oxalate complex.

公开(公告)号：US20200020932A1

公开(公告)日：2020-01-16

申请号：US16497609

申请日：2018-02-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Taisuke Asano ,  Yohei Uchiyama ,  Taisuke Yamamoto ,  Tatsuya Akira ,  Norihisa Yamamoto ,  Hiroshi Minami

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/38 ,  H01M4/48 ,  H01M10/0525

Abstract: Disclosed is a negative electrode material for a non-aqueous electrolyte secondary battery, including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and at least one element Me dispersed in the lithium silicate phase, and selected from the group consisting of a rare-earth element and an alkaline-earth metal. The composition of the lithium silicate phase is represented, for example, by the formula: Li2zSiO2+z, and satisfies 0

公开(公告)号：US11923528B2

公开(公告)日：2024-03-05

申请号：US16471944

申请日：2017-12-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Satoshi Nishitani ,  Hiroshi Minami ,  Masaki Deguchi

IPC: H01M4/131 ,  H01M4/02 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/485 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/364 ,  H01M4/386 ,  H01M4/485 ,  H01M4/587 ,  H01M4/622 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2004/027

Abstract: A positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode material, a binder, and a thickener, and the negative electrode material includes a lithium silicate phase, and Si particles dispersed in the lithium silicate phase. The ratio of the Si particles in the negative electrode material is 30 mass % or more. The binder includes a poly(meth)acrylic acid, the thickener includes a carboxyalkyl cellulose, and the amount of the poly(meth)acrylic acid relative to 100 parts by mass of the negative electrode material is 0.1 parts by mass or more and 5 parts by mass or less. The non-aqueous electrolyte includes a lithium salt, a non-aqueous solvent, and an acid that exhibits a pKa of 1 to 30 in water at 25° C. The non-aqueous electrolyte secondary battery can suppress the generation of gas during high-temperature storage, and secure excellent cycle characteristics.

公开(公告)号：US11196040B2

公开(公告)日：2021-12-07

申请号：US16464817

申请日：2017-11-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yohei Uchiyama ,  Taisuke Yamamoto ,  Tatsuya Akira ,  Norihisa Yamamoto ,  Hiroshi Minami

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M4/62 ,  H01M4/02

Abstract: Disclosed is a negative electrode material including: a lithium silicate phase that contains a lithium silicate; and silicon particles that are dispersed in the lithium silicate phase, wherein the silicon particles have a crystallite size of 10 nm or more, and the lithium silicate has a composition represented by the following formula: Li2Si2O5.(x−2)SiO2, where 2

公开(公告)号：US20180287140A1

公开(公告)日：2018-10-04

申请号：US15753797

申请日：2016-08-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tatsuya Akira ,  Taizou Sunano ,  Hiroshi Minami

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/131 ,  H01M10/052

Abstract: Negative electrode active material particles each include a composite particle containing silicon particles and a lithium silicate phase represented by LixSiOy (0